CN101660435A - Hydraulic camshaft and hydraulic control system thereof - Google Patents
Hydraulic camshaft and hydraulic control system thereof Download PDFInfo
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- CN101660435A CN101660435A CN200910144938A CN200910144938A CN101660435A CN 101660435 A CN101660435 A CN 101660435A CN 200910144938 A CN200910144938 A CN 200910144938A CN 200910144938 A CN200910144938 A CN 200910144938A CN 101660435 A CN101660435 A CN 101660435A
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- 230000006698 induction Effects 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000006837 decompression Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The invention relates to a hydraulic camshaft and a hydraulic control system thereof. When an engine runs in a middle-high load work condition, an ECU respectively transmits four groups of switching signals to a solenoid valve according to a cam phase sensor, and the solenoid valve respectively changes the oil pressure of oil circuits which are connected with four hydraulic control parts on the camshaft according to the signals; the states of the hydraulic control parts of two adjacent cylinders are opposite; and switch is carried out at the position of a base circle in sequence by each cylinder. The hydraulic camshaft and the hydraulic control system thereof have simple and practical structure as well as two-stage valve lift, can improve the engine performance and fuel economy, and simultaneously reduce emission.
Description
Technical field
The present invention relates to a kind of hydraulic camshaft and hydraulic control system thereof, especially the hydraulic electromagnetic camshaft of motor car engine.
Background technique
At present, in the world at the technology of two sections valve lifts comparative maturity, usually the technology that reaches this purpose has a lot, can select the hydraulic tappet or the rocking arm of two-part, wherein more representational is companies such as Schaeffler, Eton, Delphi, also can select two kinds of driving cams, for example Honda i-vtec etc.
Except relying on independent ECU, generally adopt hydraulic system for the control mode of these component, compare with Electromagnetic Control, the design of Hydraulic System difficulty is less, but the time of implementation is longer, and for concerning the less demanding motor of instantaneous degree, it is first-selected that hydraulic control system remains.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure and can realize the hydraulic camshaft and the hydraulic control system thereof of fast response.
Another object of the present invention provides and a kind ofly can change valve lift, improves the hydraulic electromagnetic camshaft of engine performance.
To achieve these goals, the technical solution adopted in the present invention is:
(1) there is the hydraulic control part between camshaft front end in this mechanism and the camshaft body, can makes the axially mobile 10mm of camshaft;
(2) driving cam of this camshaft is made of two kinds of cams, can select driving cam according to the axial position of camshaft;
(3) the camshaft axial position is decided by the oil pressure in the oil pocket, and this oil pressure is by independently ECU and solenoid valve are handled jointly;
(4) quick response process is 300 crank angles between the most often, can avoid producing catch fire, malcombustion such as tempering;
(5) each cylinder hydraulic control system independently can make motor select only switching time when switching, and has improved the stability when motor switches.
The present invention relies on hydraulic control to finish each cylinder cam successively and switches aspect the control execution, and optimization control system to greatest extent is for the motor transient response provides feasible scheme.Simultaneously can only change the lift of individual cylinder separately according to the needs of engine operating condition.This technology is applicable to cylinder deactivation engine.
Concrete technological scheme is as follows:
A kind of hydraulic camshaft comprises camshaft front end and camshaft body, and a hydraulic control assembly is arranged between camshaft front end and the camshaft body, and it axially moves hydraulic camshaft.
Described hydraulic control assembly can make the axially mobile 10mm of hydraulic camshaft.
Also comprise driving cam and signal wheel, driving cam is made of two kinds of cams, and it can be selected according to the axial position of camshaft.
Described hydraulic control assembly comprises oilhole, and guiding groove and oil pocket, oilhole link to each other with outside oil duct and lead to oil pocket, the oil pressure decision camshaft axial position in the oil pocket, and guiding groove connects camshaft and limits the axial motion of camshaft.
Also comprise ECU and solenoid valve, it controls the oil pressure in the oil pocket jointly.
A kind of hydraulic electromagnetic camshaft, comprise the camshaft front end, the camshaft body, solenoid valve and ECU (Electrical Control Unit) ECU, one hydraulic control assembly is arranged between camshaft front end and the camshaft body, it axially moves hydraulic camshaft, this hydraulic control assembly comprises oilhole, guiding groove and oil pocket, oilhole links to each other with outside oil duct and leads to oil pocket, oil pressure decision camshaft axial position in the oil pocket, guiding groove connects camshaft and limits the axial motion of camshaft, and described ECU and solenoid valve are controlled the oil pressure in the oil pocket jointly.
The hydraulic control system of described hydraulic camshaft comprises solenoid valve and ECU (Electrical Control Unit) ECU, and described solenoid valve and ECU (Electrical Control Unit) ECU control the hydraulic pressure in the hydraulic control assembly jointly.
Each cylinder of hydraulic camshaft place motor is equipped with independently hydraulic control system.
First, second, third and fourth cylinder is respectively equipped with the first cylinder hydraulic control, the second cylinder hydraulic control, the 3rd cylinder hydraulic control, the 4th cylinder hydraulic control.
Also comprise sensor, its induction is also transmitted signal to ECU (Electrical Control Unit) ECU, and ECU (Electrical Control Unit) ECU will organize switching signal and be sent to solenoid valve, and solenoid valve is according to the oil pressure of oil circuit in the first to fourth cylinder hydraulic control on the signal difference control connection camshaft.
Described sensor is the cam phase sensor, the signal of its induced signal wheel.
The hydraulic control partial status of two adjacent cylinder is opposite, i.e. the first cylinder hydraulic control, the 3rd cylinder hydraulic control are when opening, and the second cylinder hydraulic control, the 4th cylinder hydraulic control cylinder switch to each cylinder and switch in the basic circle position successively for closing.
Compare with present prior art, beneficial effect of the present invention is embodied in: simple in structure, practical; Valve lift is a two-part; Can improve engine performance, fuel economy, reduce discharging simultaneously; Concrete advantage is as follows:
(1) realize variable valve lift, engine performance significantly improves;
(2) discharging, oil consumption are starkly lower than the motor with discharge capacity
(3) simple in structure, compact, reasonable in design, the motor overall volume does not have obvious change
(4) each cylinder is controlled separately, and control mode is flexible and changeable
(5) strengthened the moment of torsion output of motor when low speed
Description of drawings
Fig. 1: hydraulic control part partial sectional view of the present invention
Fig. 2: hydraulic control closed condition sectional view
Fig. 3: hydraulic control opening state sectional view
Fig. 4: system schematic
1-camshaft front end, 2-hydraulic control assembly, 3-driving cam, 4-camshaft body, 5-signal wheel, 6-oilhole, 7-guiding groove, 8-oil pocket, the 9-first cylinder hydraulic control, the 10-second cylinder hydraulic control, 11-the 3rd cylinder hydraulic control, 12-the 4th cylinder hydraulic control
Embodiment
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
This system mainly is made up of hydraulic electromagnetic camshaft, solenoid valve, sensor and ECU etc. as shown in Figure 4.
When motor operates in middle and high load working condition, ECU is transferred to solenoid valve with 4 groups of switching signals respectively according to the cam phase sensor, solenoid valve changes the oil pressure that connects 4 hydraulic control part oil circuits on the camshaft respectively according to this signal, the hydraulic control partial status of two adjacent cylinder is opposite, promptly 9,11 when opening, 10,12 cylinders switch to each cylinder and switch in the basic circle position successively then for closing, and whole switch step is as follows:
(1) 1 cylinder hydraulic control 9 decompressions, 10 superchargings of 2 cylinder hydraulic controls are simultaneously finished 1 cylinder cam and are switched;
(2) 2 cylinder hydraulic controls 10 decompressions are finished 2 cylinder cams and are switched;
(3) 3 cylinder hydraulic controls 11 decompressions, 12 superchargings of 4 cylinder hydraulic controls are simultaneously finished 3 cylinder cams and are switched;
(4) 4 cylinder hydraulic controls 12 decompressions are finished 4 cylinder cams and are switched
When switching to low lift, whole process is opposite with above step.
In the process of carrying out the switching of driving cam state, the oil of outside oil duct is from oilhole 6 turnover oil pockets 8, and the axial motion of camshaft is by restriction, the connection of guiding groove 7 simultaneously.
In conjunction with top fundamental diagram the technical program is further described,
A kind of hydraulic electromagnetic camshaft, comprise camshaft front end 1, camshaft body 4, solenoid valve and ECU (Electrical Control Unit) ECU, one hydraulic control assembly 2 is arranged between camshaft front end 1 and the camshaft body 4, it axially moves hydraulic camshaft, this hydraulic control assembly 2 comprises oilhole 6, guiding groove 7 and oil pocket 8, oilhole 6 links to each other with outside oil duct and leads to oil pocket 8, oil pressure decision camshaft axial position in the oil pocket 8, guiding groove 7 connects camshaft and limits the axial motion of camshaft, and described ECU and solenoid valve are controlled the oil pressure in the oil pocket 8 jointly.
The hydraulic control system of described hydraulic camshaft, comprise the cam phase sensor, solenoid valve and ECU (Electrical Control Unit) ECU, described solenoid valve and ECU (Electrical Control Unit) ECU control the hydraulic pressure in the hydraulic control assembly 2 jointly, each cylinder of hydraulic camshaft place motor is equipped with independently hydraulic control system, promptly first, two, three, four cylinders are respectively equipped with the first cylinder hydraulic control 9, the second cylinder hydraulic control 10, the 3rd cylinder hydraulic control 11, the 4th cylinder hydraulic control 12, sensor sensing also transmits signal to ECU (Electrical Control Unit) ECU, ECU (Electrical Control Unit) ECU is sent to solenoid valve with 4 groups of switching signals, and solenoid valve is according to first to fourth cylinder hydraulic control 9,10 on the signal difference control connection camshaft, the oil pressure of oil circuit in 11,12.The hydraulic control partial status of two adjacent cylinder is opposite, and when promptly the first cylinder hydraulic control 9, the 3rd cylinder hydraulic control 11 were for unlatching, the second cylinder hydraulic control 10, the 4th cylinder hydraulic control 12 cylinders switched to each cylinder and switch in the basic circle position successively for closing.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technological scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (12)
1, a kind of hydraulic camshaft is characterized in that, comprises camshaft front end (1) and camshaft body (4), and a hydraulic control assembly (2) is arranged between camshaft front end (1) and the camshaft body (4), and it can axially move hydraulic camshaft.
2, hydraulic camshaft as claimed in claim 1 is characterized in that, described hydraulic control assembly (2) can make the axially mobile 10mm of hydraulic camshaft.
3, hydraulic camshaft as claimed in claim 1 is characterized in that, also comprises driving cam (3) and signal wheel (5), and driving cam (3) is made of two kinds of cams, and it can be selected according to the axial position of camshaft.
4, as claim 1 or 3 described hydraulic camshafts, it is characterized in that, described hydraulic control assembly (2) comprises oilhole (6), guiding groove (7) and oil pocket (8), oilhole (6) links to each other with outside oil duct and leads to oil pocket (8), oil pressure decision camshaft axial position in the oil pocket (8), guiding groove (7) connects camshaft and limits the axial motion of camshaft.
5, hydraulic camshaft as claimed in claim 4 is characterized in that, also comprises ECU and solenoid valve, and it controls the oil pressure in the oil pocket (8) jointly.
6, a kind of hydraulic electromagnetic camshaft, it is characterized in that, comprise camshaft front end (1), camshaft body (4), solenoid valve and ECU (Electrical Control Unit) ECU, one hydraulic control assembly (2) is arranged between camshaft front end (1) and the camshaft body (4), it can make hydraulic camshaft axially move, this hydraulic control assembly (2) comprises oilhole (6), guiding groove (7) and oil pocket (8), oilhole (6) link to each other with outside oil duct and lead to oil pocket (8), the oil pressure decision camshaft axial position in the oil pocket (8), guiding groove (7) connects camshaft and limits the axial motion of camshaft, and described ECU and solenoid valve are controlled the oil pressure in the oil pocket (8) jointly.
7, a kind of hydraulic control system as hydraulic camshaft as described in the claim 1-4 is characterized in that comprise solenoid valve and ECU (Electrical Control Unit) ECU, described solenoid valve and ECU (Electrical Control Unit) ECU control the hydraulic pressure in the hydraulic control assembly (2) jointly.
8, hydraulic control system as claimed in claim 7 is characterized in that, each cylinder of hydraulic camshaft place motor is equipped with independently hydraulic control system.
9, hydraulic control system as claimed in claim 8 is characterized in that, first, second, third and fourth cylinder is respectively equipped with the first cylinder hydraulic control (9), the second cylinder hydraulic control (10), the 3rd cylinder hydraulic control (11), the 4th cylinder hydraulic control (12).
10, hydraulic control system as claimed in claim 9, it is characterized in that, also comprise sensor, its induction is also transmitted signal to ECU (Electrical Control Unit) ECU, ECU (Electrical Control Unit) ECU is sent to solenoid valve with 4 groups of switching signals, and solenoid valve is according to first to fourth cylinder hydraulic control (9,10 on the signal difference control connection camshaft, 11,12) oil pressure of oil circuit in.
11, hydraulic control system as claimed in claim 10 is characterized in that, described sensor is the cam phase sensor, the signal that its induced signal wheel (5) transmits.
12, as claim 10 or 11 described hydraulic control systems, it is characterized in that, the hydraulic control partial status of two adjacent cylinder is opposite, the i.e. first cylinder hydraulic control (9), the 3rd cylinder hydraulic control (11) are when opening, the second cylinder hydraulic control (10), the 4th cylinder hydraulic control (12) cylinder switch to each cylinder and switch in the basic circle position successively for closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910144938A CN101660435B (en) | 2009-09-14 | 2009-09-14 | Hydraulic camshaft and hydraulic control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910144938A CN101660435B (en) | 2009-09-14 | 2009-09-14 | Hydraulic camshaft and hydraulic control system thereof |
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| CN101660435A true CN101660435A (en) | 2010-03-03 |
| CN101660435B CN101660435B (en) | 2012-10-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071981A (en) * | 2011-01-31 | 2011-05-25 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN105508071A (en) * | 2014-10-14 | 2016-04-20 | 光阳工业股份有限公司 | Double-cylinder engine air suction detecting device and method |
| CN109630282A (en) * | 2018-11-30 | 2019-04-16 | 潍坊力创电子科技有限公司 | The automatically controlled adjustment device of engine oil advance angle |
| CN110566303A (en) * | 2019-09-24 | 2019-12-13 | 深圳臻宇新能源动力科技有限公司 | Engine camshaft and engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19620744B4 (en) * | 1995-06-07 | 2006-02-02 | Volkswagen Ag | Device for influencing the timing of an internal combustion engine |
| DE59507966D1 (en) * | 1995-10-03 | 2000-04-13 | Waertsilae Nsd Schweiz Ag Wint | Hydraulic valve drive |
| KR100521510B1 (en) * | 2003-05-12 | 2005-10-13 | 현대자동차주식회사 | Separation type cam shaft structure |
| DE102005003446A1 (en) * | 2005-01-27 | 2006-08-10 | Schaeffler Kg | Electromagnetic hydraulic valve |
| GB2424256A (en) * | 2005-03-16 | 2006-09-20 | Mechadyne Ltd | SCP assembly with spring mounted on camshaft rather than within phaser housing |
| CN100572763C (en) * | 2007-11-21 | 2009-12-23 | 刘若丹 | The rotor air-valve of timing of stepless continuous adjustable valve and valve stroke |
-
2009
- 2009-09-14 CN CN200910144938A patent/CN101660435B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071981A (en) * | 2011-01-31 | 2011-05-25 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN102071981B (en) * | 2011-01-31 | 2012-11-07 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN105508071A (en) * | 2014-10-14 | 2016-04-20 | 光阳工业股份有限公司 | Double-cylinder engine air suction detecting device and method |
| CN105508071B (en) * | 2014-10-14 | 2019-07-26 | 光阳工业股份有限公司 | Double cylinder engine air inlet arrangement for detecting and method for detecting |
| CN109630282A (en) * | 2018-11-30 | 2019-04-16 | 潍坊力创电子科技有限公司 | The automatically controlled adjustment device of engine oil advance angle |
| CN109630282B (en) * | 2018-11-30 | 2023-08-15 | 潍坊力创电子科技有限公司 | Engine oil supply advance angle electric control adjusting device |
| CN110566303A (en) * | 2019-09-24 | 2019-12-13 | 深圳臻宇新能源动力科技有限公司 | Engine camshaft and engine |
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| CN101660435B (en) | 2012-10-24 |
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